Changes between Version 24 and Version 25 of doc/app/examples/cbl

Timestamp:

Jun 28, 2019 9:22:08 AM (6 years ago)

Author:

Giersch

Comment:

--

doc/app/examples/cbl

@@ -2 +2 @@
 
 In this chapter a brief, simple and complete parameter set is described, which can be used to simulate a quasi-stationary, convective, atmospheric boundary layer with zero mean horizontal wind. For evaluation purposes, cross sections and horizontally averaged vertical profiles of typical boundary layer variables are output at the end of the run. \\\\
-The convective boundary layer parameter file necessary to carry out a run must be provided to the model as an input file under the local name [../../iofiles#PARIN PARIN]. It is attached to this site (see [attachment:example_cbl_p3d example_cbl_p3d]).
+The convective boundary layer parameter file necessary to carry out a run must be provided to the model as an input file under the local name [../../iofiles#PARIN PARIN]. It is stored in [https://palm.muk.uni-hannover.de/trac/browser/palm/trunk/TESTS/cases/example_cbl/ trunk/TESTS/cases/example_cbl]).
 
 The initialization parameters ([../../inipar &initialization_parameters]) are located at the beginning of the file. For analysis of a convective boundary layer of approx. 1000 m thickness the horizontal size of the model domain should amount to at least ''2 km x 2 km''. In order to resolve the convective structures a grid spacing of [../../inipar#dx dx]'' = ''[../../inipar#dy dy]'' = ''[../../inipar#dz dz]'' = 50 m'' is enough, since the typical diameter of convective plumes is more than ''100 m.'' Thereby the upper array index in the two horizontal directions needs to be [../../inipar#nx nx]'' = ''[../../inipar#ny ny]'' = 39'' . Since in each case the lower array index has the value ''0'', ''40'' grid points are used along both horizontal directions. In the vertical direction the domain must be high enough to include the entrainment processes at the top of the boundary layer as well as the propagation of gravity waves, which were stimulated by the convection. However, in the stably stratified region above the boundary layer the grid resolution has not necessarily to be as high as within the boundary layer. This can be obtained by a vertical stretching of the grid starting from ''1225 m'' via [../../inipar#dz_stretch_level dz_stretch_level]''= 1225.0 m.''